Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 167
stat is to absorb electricalenergy, and this energy, which appears as heat, is wasted in-stead of performing any useful work. A rheostat may beconstructed of coils of iron wire, iron plates or strips; car-bon, either pulverized in tubes or in the form of solid rodsor discs; German silver,… … Fig. 123.—Commercial Type ofRheostat. CIBCUITS AXD THEIR RESISTANCE. 149
Electricity · Magnetism
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